Rambam and Chasidus was accepted as 100% legit by all Gedolim of subsequent doros. MO was not.
Easy to say that hundreds of years after the fact. It took quite a while for the Rambam and Chassidus to be “accepted as 100% legit,” sometimes even a century or two. How do you know that MO won’t be “accepted as 100% legit” hundreds of years from now?
The Wolf